According to this video:
http://www.youtube.com/watch?v=BqKeiiezqzc
it should be possible to levitate humans because the water in our bodies is diamagnetic - but it is stated (at 1:14) "although the magnetic fields required would be enormous".
So I wonder: how strong of a magnetic field would you need to levitate a human (using only the diamagnetism of the water in our bodies)? And (maybe easier to do) - how strong was the field used to levitate the frog in the video?
There must be a way to compute the amount of magnetization that occurs, and how that results in a repulsive force; but I don't know where to begin. Any suggestions?
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